Question

Three objects with masses m1 = 36.5 kg, m2 = 19.2 kg, and m3 =
12.5 kg are hanging from massless ropes that run over frictionless
pulleys as shown in the figure above. The system is released from
rest. What is the magnitude of the acceleration (in m/s2) of the
mass m1? I will rate as soon as the correct answer is given in
detail. Thank you!